2.7 KiB
Quectel EG25-G GSM Modem
Quectel Setup
The Quectel should be conencted to a ConnectTech's Elroy board. The Quectel module requires to connect the antenna on the MAIN and GNSS sockets. Make sure to use a SIM card with full access to the mobile network.
Installation
Clone the repository:
mkdir ~/git/ && cd ~/git/
git clone https://git.spirirobotics.com/dchvs/eg25-g.git
cd eg25-g/
Create udhcpc directories, copy in the script, and give it execution permission:
sudo mkdir -p /usr/share/udhcpc
sudo mkdir -p /etc/udhcpc/
sudo cp quectel-CM/default.script /usr/share/udhcpc/
sudo cp quectel-CM/default.script /etc/udhcpc/
sudo chmod +x /usr/share/default.script
sudo chmod +x /etc/udhcpc/default.script
Create a udhcpc symbolic link:
sudo ln -s /bin/busybox /bin/udhcpc
Build the application:
cd quectel-CM/quectel-CM
make
Running
The following command launches the package, with [apn-name] being substituted with the APN of the wireless provider. For BICS, the APN is bicsapn. To run this in the background, add & to the end of the command.
sudo ~/git/eg25-g/quectel-CM/quectel-CM -s [apn-name] &
Troubleshooting
If the modem is correctly connected to the system, the following command will show the GSM modem attaching to ttyUSB0, ttyUSB1, ttyUSB2, and ttyUSB3:
dmesg | grep GSM
If the modem has successfully connected to a tower and is being served an IP address, then the following command will show an IP address being served:
ifconfig eth1
ping -I eth1 www.google.com
Appends
Kernel Changes
The Driver for the EG25-G Quectel module consists has the following structure on the Kernel space side, for interfacing it and adding its Network packets transmisions on Kernel.
.
├── kernel
└── kernel-4.9-spiri
└── drivers
└── net
└── usb
├── GobiUSBNet.c
├── Kconfig
├── Makefile
├── QMI.c
├── QMIDevice.c
├── QMIDevice.h
├── QMI.h
└── Structs.h
In order to add the Driver to the Kernel, the following reference Kernel files are patched:
- drivers/usb/serial/option.c
- drivers/usb/serial/usb_wwan.c
- drivers/net/usb/qmi_wwan.c